Sains Malaysiana 46(11)(2017): 2149-2162

http://dx.doi.org/10.17576/jsm-2017-4611-16

 

Non-seismic Geophysical Prospecting Model of Beiya Gold Mine in Western Yunnan Province

(Model Pencarigalian Geofizik Tak Seismik Lombong Emas Beiya di Wilayah Barat Yunnan)

 

JIAN YANG1*, QIAO WANG1, SHENGXIAN LIANG1, JING GUO1 & MUHAMMAD

AQEEL ASHRAF2

 

1Chengdu Center, China Geological Survey, Chengdu 610081, China

 

2International Water, Air & Soil Conservation Society, 59200 Kuala Lumpur, Federal Territory

Malaysia

 

Diserahkan: 25 Januari 2017/Diterima: 25 Mei 2017

 

ABSTRACT

According to the basic rules and characteristics of the gold-polymetallic deposits of Beiya gold mine area in terms of mineralization and ore controlling, it is concluded that skarn deposit is the main ore deposit type in this area and the geological conditions are analyzed by the statistics of the physical parameters. Then, the tectonic, rocks, stratum, ore geophysical models have been treated by the forward modeling numerical simulation and the results are analyzed comprehensively. Based on the forward modeling results, combined with the relevant physical differences, the principle and exploration method test and research for the comprehensive geophysical exploration technology has been carried out, covering the induced polarization and magnetic prospecting for the ore body as well as the indirect geophysical exploration method by means of plane gravity data, audio-magnetotelluric sounding for rock mass and tectonics, the mineralization mode-physical forward modeling - geophysical exploration mode has been established and good results have been achieved. Therefore, a location forecast method has been put forward for the concealed skarn type Fe-Au deposit which is adaptive to the mineralized geological background of Beiya and other similar areas.

 

Keywords: Beiya gold ore; forward modeling; prospecting model

 

ABSTRAK

Menurut peraturan asas dan ciri timbunan polilogam emas di kawasan lombong emas Beiya daripada segi mineralisasi dan pengawalan bijih, dapat disimpulkan bahawa timbunan skarn adalah timbunan bijih utama di kawasan ini dan keadaan geologinya dianalisis oleh parameter fizikal statistik. Seterusnya, model tektonik, batuan, strata dan geofizik bijih telah dirawat menggunakan model ke hadapan simulasi berangka dan hasilnya dianalisis secara menyeluruh. Berdasarkan hasil pemodelan ke hadapan, digabungkan dengan perbezaan fizikal yang relevan, kaedah pengujian dan penyelidikan prinsip dan eksplorasi untuk teknologi eksplorasi geofizik yang komprehensif telah dijalankan, meliputi kaedah polarisasi teraruh dan pencarigalian magnet untuk jisim bijih serta kaedah penerokaan geofizik tidak langsung dengan menggunakan data graviti pesawat, bunyi magnetotellurik untuk jisim batuan dan tektonik, mod mineralisasi - pemodelan fizikal ke hadapan - mod penerokaan geofizik telah dibentuk dan keputusan yang baik telah dicapai. Oleh itu, kaedah ramalan lokasi dikemukakan bagi mengesean timbunan skarn jenis Fe-Au tersembunyi yang mudah sesuai dengan latar belakang geologi mineral di kawasan Beiya dan kawasan yang sama.

 

Kata kunci : bijih emas Beiya; model pencarigalian; pemodelan ke hadapan

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